The California nebula, also known as NGC 1499, an emission nebula around 100 light-years long. Hydrogen atoms, electrons and energetic starlight as photographed under the pristine dark skies of Exmoor.
10th November 2018, Exmoor, GMT+0, United Kingdom, TEMP: 8C, HUM: 96%, Bortle Class 3 ~SGM: 21.75 mag./arc sec2
Camera: Nikon D810A
Imaging Telescope: Takahashi FS-60CB
Correcting Lens: Takahashi Reducer 0.72x (composite focal length at 264mm and focal ratio at f/4.9)
Mount: iOptron CEM25EC
14 bit RAW (NEF)
ISO 3200, 6 x 180" subs
18mins
23 Darks, 23 Bias, 25 Flats
PixInsight 1.8 Core
Photoshop